In January, gasoline cost $1.05 per gallon. In July, gasoline cost $1.20 per gallon. Find the percent of increase.
Would the answer for this question be 14.3?
And how do you do percent of decrease?
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The original cost of a computer is $900. If the price is decreased by 15%, what is the sale price?
I need help with this question(:
Thank you
percent (increase or decrease) is
Percent= (final-initial)/initial * 100
fifteen percent of 900 is 130 dollars.
so the cost is 900-130 dollars
price=(100-percentdecrease)/100 * 900
To find the percent increase or percent decrease, you can use the formula:
percent change = ((new value - old value) / old value) * 100
For the first question about the percent of increase in gasoline cost:
Starting with the old value of $1.05 per gallon in January and the new value of $1.20 per gallon in July:
percent increase = (($1.20 - $1.05) / $1.05) * 100 = (0.15 / $1.05) * 100 ≈ 14.3%
Yes, the answer for this question would be approximately 14.3%.
Now, to explain how to calculate the percent of decrease:
You would follow the same formula, but instead of subtracting the new value from the old value, you would subtract the old value from the new value.
For the second question about the sale price of a computer:
Starting with the original price of $900 and a decrease of 15%:
percent decrease = (($900 * 0.15) / $900) * 100 = (135 / $900) * 100 = 15%
To find the sale price, you need to subtract the percent decrease from the original price:
sale price = $900 - ($900 * 0.15) = $900 - $135 = $765
Therefore, the sale price of the computer would be $765.